摘要
针对高分六号(GF-6)卫星WFV传感器单相机超大幅宽成像和影像分块分发的特点,以谷歌地球影像为参考,通过分析同名点坐标差异,对GF-6卫星WFV影像几何定位精度进行了长时间序列评价。试验结果表明,对于单景WFV影像而言,左、中、右3块子影像均出现了明显的系统误差分布情况,且误差大小依次增大。对于长时间序列的WFV影像而言,各影像定位误差方向均指向西侧,即跨轨方向误差明显大于沿轨方向误差,且中间子影像的定位误差波动最小,整景WFV影像平均平面定位误差约为676.26 m。
Through integrating the characteristics of single WFV camera onboard GF-6 satellite with super wide imaging capability and the block distribution service of WFV imagery,taking Google Earth images as geometric references,analyzing the coordinate differences of homologous points,the authors evaluate the geo-positioning errors of the long time-series GF-6/WFV images.The experiment results show that the geo-positioning errors in one signal image including the left,middle,right sub-images appear obviously systematic errors.The modules of errors become larger from left sub-image to right sub-image.The directions of errors all point to west.The errors in across-track direction are obviously larger than the errors in along-track direction.The geo-positioning error fluctuation of the middle sub-image is the minimum.The average plane geo-positioning error of WFV image is approximately 676.26 m.
作者
李慧娜
吉笑笑
韩杰
关小果
LI Huina;JI Xiaoxiao;HAN Jie;GUAN Xiaoguo(School of Electrical and Mechanical Engineering,Xuchang University,461000,Xuchang,Henan,PRC;School of Urban and Environment Sciences,Xuchang University,461000,Xuchang,Henan,PRC)
出处
《江西科学》
2022年第1期99-103,共5页
Jiangxi Science
基金
河南省科技攻关项目(212102310029)
2022年许昌学院校内科研基金项目(2022YB039)
国家民用空间基础设施项目(陆地观测卫星共性应用支撑平台)
2022年度许昌学院国家级科研项目培育基金项目(2022GJPY007)。
